#include <stdio.h>
int main()
{
    int a[100]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20},n,i,sum=0,flog=0;
    printf("Enter a number");
    scanf("%d",&n);
    for(i=0,i<=19,i++)
    {
        if(a[i]==n)
        {
            flog=1;
            sum++;
        }
    }
    if(flog==1)
    {
        printf("The chazhao number is %d",sum);
    }
    return 0;
}

[Error] C:\Users\hp\Documents\C-Free\Projects\arr2\main.c:7: error: syntax error before ')' token
[Error] C:\Users\hp\Documents\C-Free\Projects\arr2\main.c:14: error: syntax error before '}' token

我自己找到了 谢谢了

for 循环内用分号

我看到了逗号